Stackable wine rack



FIG. 1 is a top plan view of a stackable wine rack showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view, the left side being a mirror image thereto; and

FIG. 4 is a bottom plan view thereof. 

The ornamental design for a stackable wine rack, substantially as shown and described. 